Scroll fluid machine with cooling fan and passage

摘要

A scroll fluid machine having: a compressor body including a fixed scroll and an orbiting scroll opposed to the fixed scroll, the orbiting scroll orbiting; a drive shaft connected to the orbiting scroll; a cooling fan provided on another side of the drive shaft opposite to the orbiting scroll, the cooling fan generating a cooling wind; and a cooling wind passage surrounded by walls in all directions, the cooling wind passage sending the cooling wind of the cooling fan to the compressor body, when the cooling wind passage being disposed left and the drive shaft being disposed right when seen from a direction in which the drive shaft extends, a size of the cooling wind passage in the left and right directions being smaller in upstream than downstream of the cooling wind passage.

主权项

1. A scroll fluid machine comprising:
a compressor body having a fixed scroll and an orbiting scroll, opposed to the fixed scroll, to make orbiting motions; a motor, accommodated by a motor casing, having a drive shaft extending along a drive shaft axis and connected on one side of the motor to the orbiting scroll; a cooling fan provided on the drive shaft on another side of the motor opposite to the orbiting scroll, the cooling fan generating a cooling wind; and a cooling wind passage circumferentially surrounded by walls in all directions, the cooling wind passage sending the cooling wind of the cooling fan to the compressor body and being separated from the motor casing by the walls, wherein upstream portions of the cooling wind passage are smaller than downstream portions of the cooling wind passage in a first direction perpendicular to the drive shaft axis, and wherein, in the cooling wind passage, a radially inner side of a cooling passage outlet is closer to the drive shaft than a radially inner side of a cooling passage inlet.